Let's be realistic...
What is this stuff for? What is Google for? This isn't about playing chess or helping people search the internet, it's about advertising. Google is an ad delivery network that uses a search engine as bait and this AlphaZero thing is an ad delivery optimisation engine that just so happens to be able to play chess as a side effect.
On that basis, it is perfectly understandable that Google refuses to publish all the test data. Sophistry, mendacity and psychological manipulation are the pillars on which the advertising industry stands. Criticising an ad firm for being economical with the truth is like criticising the sea because you can't drink it.
Biting the hand that feeds IT
